*{
  margin:0;
  padding:0;
  box-sizing:border-box;
}

body{
  font-family:Arial,sans-serif;
  background:#000;
  color:#fff;
}

header{
  display:flex;
  justify-content:space-between;
  align-items:center;
  padding:20px 8%;
  border-bottom:1px solid #222;
}

.logo{
  font-size:28px;
  font-weight:bold;
}

.btn{
  display:inline-block;
  background:#3cff75;
  color:#000;
  padding:14px 24px;
  border-radius:12px;
  text-decoration:none;
  font-weight:bold;
  transition:0.3s;
}

.btn:hover{
  opacity:0.9;
}

.secondary{
  background:transparent;
  border:1px solid #555;
  color:#fff;
}

.hero{
  display:flex;
  flex-wrap:wrap;
  gap:50px;
  align-items:center;
  justify-content:center;
  padding:80px 8%;
}

.left{
  flex:1;
  min-width:300px;
}

.left h1{
  font-size:60px;
  line-height:1.1;
}

.left span{
  color:#3cff75;
}

.left p{
  margin-top:20px;
  color:#bbb;
  font-size:20px;
}

.buttons{
  margin-top:30px;
  display:flex;
  gap:20px;
}

.progress-box{
  margin-top:40px;
}

.progress-text{
  display:flex;
  justify-content:space-between;
  margin-bottom:10px;
  color:#aaa;
}

.progress{
  background:#222;
  height:16px;
  border-radius:20px;
  overflow:hidden;
}

.fill{
  width:78%;
  height:100%;
  background:#3cff75;
}

.card{
  flex:1;
  min-width:300px;
  background:#111;
  border:1px solid #222;
  border-radius:25px;
  padding:30px;
}

.card img{
  width:100%;
  border-radius:20px;
  margin-bottom:20px;
}

.card h2{
  margin-bottom:20px;
}

.card ul{
  list-style:none;
  line-height:2;
  color:#ccc;
}

.full{
  width:100%;
  text-align:center;
  margin-top:25px;
}

.features,
.reviews{
  padding:80px 8%;
}

.features h2,
.reviews h2{
  text-align:center;
  margin-bottom:50px;
  font-size:42px;
}

.feature-grid,
.review-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(250px,1fr));
  gap:25px;
}

.feature,
.review{
  background:#111;
  border:1px solid #222;
  padding:30px;
  border-radius:20px;
}

.feature h3{
  color:#3cff75;
  margin-bottom:15px;
}

.review{
  text-align:center;
  color:#3cff75;
}

.review p{
  color:#ccc;
  margin-top:15px;
}

footer{
  text-align:center;
  padding:30px;
  border-top:1px solid #222;
  color:#777;
}

@media(max-width:768px){
  .left h1{
    font-size:42px;
  }

  .buttons{
    flex-direction:column;
  }
}